You can send in US Dollars also. I sent US Postal Money Order. $510 US Dollars for each person.
First I sent two Money Orders like $550 US Dollars each, CIC returned my application due to over payment. Then I sent again with $1000+$20 US Dollars Money Order (USPS will give maximum of $1000 money order, So I took one for $1000 and another $20-- for mine and my wife)